A Novel Method for Estimating the Position and Speed of a Winding Segmented Permanent Magnet Linear Motor

This paper presents a novel means of sensorless drive of the winding segmented permanent magnet linear motor (WS-PMLM). In order to solve the problem of the deviation of the position and speed estimation of the mover caused by the sharp changes of the inductance, flux linkage, and back electromotive...

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Bibliographic Details
Published in:Energies (Basel) 2023-04, Vol.16 (8), p.3361
Main Authors: Liu, Jiaxi, Cao, Jiwei, Li, Liyi
Format: Article
Language:English
Subjects:
Back electromotive force
Design and construction
disturbance observer
Electric motors
Electromagnetic fields
Electromotive forces
Estimation
full-order state observer
Inductance
Linear electric motors
Magnets, Permanent
Mathematical models
Permanent magnets
Power supply
sensorless
State observers
Winding
winding segmented permanent magnet linear motor
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Summary:This paper presents a novel means of sensorless drive of the winding segmented permanent magnet linear motor (WS-PMLM). In order to solve the problem of the deviation of the position and speed estimation of the mover caused by the sharp changes of the inductance, flux linkage, and back electromotive force (EMF) between the segments of the WS-PMLM, a method for position estimation by the compound back-EMF is proposed to eliminate the blind spot of intersegment position estimation. In terms of speed estimation, a full-order speed observer method based on the dynamics equation is proposed, the configuration of the feedback gain of the observer is analyzed, and a simulation is used to verify that the full-order state observer (FSO) method can effectively reduce the estimated speed fluctuation in the intersegment region and that the speed estimation accuracy is ultimately improved.
ISSN:1996-1073
1996-1073
DOI:10.3390/en16083361